CVE-2021-39341

OptinMonster <= 2.6.4 Unprotected REST-API Endpoints

Severity Score

8.2

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

The OptinMonster WordPress plugin is vulnerable to sensitive information disclosure and unauthorized setting updates due to insufficient authorization validation via the logged_in_or_has_api_key function in the ~/OMAPI/RestApi.php file that can used to exploit inject malicious web scripts on sites with the plugin installed. This affects versions up to, and including, 2.6.4.

El plugin OptinMonster de WordPress es vulnerable a una divulgación de información confidencial y a la actualización no autorizada de la configuración debido a una comprobación insuficiente de la autorización por medio de la función logged_in_or_has_api_key en el archivo ~/OMAPI/RestApi.php que puede ser usada para explotar una inyección de scripts web maliciosos en los sitios con el plugin instalado. Esto afecta a las versiones hasta 2.6.4 incluyéndola

*Credits: Chloe Chamberland, Wordfence

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

Low

Availability

None

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-08-20 CVE Reserved
2021-11-01 CVE Published
2024-07-17 EPSS Updated
2024-09-17 CVE Updated
2024-09-17 First Exploit
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-285: Improper Authorization
CWE-319: Cleartext Transmission of Sensitive Information
CWE-863: Incorrect Authorization

CAPEC

References (3)

URL	Tag	Source
https://plugins.trac.wordpress.org/browser/optinmonster/trunk/OMAPI/RestApi.php?rev=2606519#L1460	Third Party Advisory
https://wordfence.com/vulnerability-advisories/#CVE-2021-39341	Third Party Advisory

URL	Date	SRC
https://www.wordfence.com/blog/2021/10/1000000-sites-affected-by-optinmonster-vulnerabilities	2024-09-17

URL	Date	SRC

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Optinmonster Search vendor "Optinmonster"		Optinmonster Search vendor "Optinmonster" for product "Optinmonster"				<= 2.6.4 Search vendor "Optinmonster" for product "Optinmonster" and version " <= 2.6.4"		wordpress		Affected